firmus energy Supply, one of Northern Ireland’s largest suppliers of natural gas, has announced that it will be making a further reduction to its tariffs for all domestic customers in the Ten Towns Network area.This decrease, which is effective from 1st October 2025, will save households an average of £78 per year. firmus previously lowered its gas tariff by 11.84% in April, providing a significant saving for customers across its Ten Towns Network area.
Announcing this further reduction, Ryan Miskimmin, Sales Director at firmus energy Supply said: “We are pleased to share our second tariff reduction of the year and are always committed to passing on any savings to customers, whenever it is possible for us to do so. Having engaged with the Utility Regulator, and Consumer Council, we are able to announce this reduction of 7.86 %.
“Since April this year, our consecutive reductions have decreased our tariffs by almost 19%, representing an average household saving of £210 per year. As we head into the colder months, we know that these savings coupled with the constant heat and instant hot water that natural gas provides, will be welcomed by Ten Towns customers.”
An announcement regarding the Greater Belfast Network area will be made in the coming weeks.
Customers seeking to switch to natural gas, or to get advice on their bills or direct debit payments should contact the firmus energy Supply’ locally based Customer Services team on 0330 024 9000 or via [email protected] . For free and independent advice on how to save energy please contact NI Energy Advice Line on 0800 111 4455.


